Get total length of Video in PHP

    //Total Length of video can be userful at many cases. Following code sample shows
    // how to get the total length or duration of any video file

    //get the filename of video
    $uploadVideoFile = $_FILE["fleVideo"]["name"];

    //turn on the output buffering
    ob_start();

    //execute the the ffmpef command, where -i is the input
    //the 2>&1 is done to redirect standard error (stderr) to standard output(stdout)
    system("/path/to/ffmpeg -i $uploadVideoFile 2>&1");
    //now get the contents
    $totalDuration = ob_get_contents();

    //clear the output buffer and turn off the output buffering done by ob_start()
    ob_end_clean();

    //perform a regular expression match
    //check for the pattern Duration: ... in $duration and return matches
    preg_match('/Duration: (.*?),/', $duration, $matches);

    //found the matches
    //this is the total length of video
    $totalLength = $matches[1];
    echo "Total Length of the video is:".$totalLength;
?>